The GooKing Sword (Gumiou no Tsurugi, グミオウの剣?, lit. "Gumiking Sword") is a very rare weapon that can be found in Breath of Fire III and Breath of Fire IV. It can only obtained by the Goo King enemy by defeating it. However the drop rate is the lowest in both games, which makes the process of obtaining it much more difficult. As such it is recommended to use the skill Charm to increase the chance of obtaining it, as well stealing it's Apple in order to keep it in battle, as it would otherwise flee.